factor bootstrap behavior into boot.js
reimplement inserted|removed|attributeChanged(Callback) using MutationObserver (note: lifecycle callbacks on 'lifecycle' object instead of prototype no longer supported)
fix srcmap URLs
Update README.md
Update README.md
ensure CustomElements scope exists
add missing dependencies
fixing callback name
Refactor element upgrade and insertion/removal watching into a unified observer system
Unify side table
rename some methods in Observer.js, improve comments
document.register only triggers document-wide upgrade when called after initial load is complete, pre-load-complete registrations are processed in one step on load-complete
Merge branch 'master' of https://github.com/toolkitchen/CustomElements into observer
Merge commit '2c80460' into observer
Merge pull request #21 from toolkitchen/observer

Merge Observer Refactor
s/removedSubtree/removedNode, must remove node and subTree
cleanup tests
cleanup tests
cleanup tests
Avoid processing style elements that are already in the main document.